Gastromyzon Cornusaccus

Datasheet

Behaviour

The Gastromyzon Cornusaccus species is known for its very peaceful nature; however, its environmental requirements limit suitable tankmates to smaller, non-aggressive, and non-competitive fish species. Ideal companions include small cyprinids like Tanichthys, Danio, and Rasbora, stream-dwelling gobies such as species from the genera Rhinogobius, Sicyopterus, and Stiphodon, and rheophilic catfish like Glyptothorax, Akysis, and Hara spp. It's essential to avoid housing them with much larger or aggressive fish to ensure harmonious tank dynamics. Some loaches from specific families are suitable tankmates, while others are not, so thorough research before selection is recommended. Gastromyzon Cornusaccus can be territorial to some extent, with certain individuals displaying a more protective nature over their space, particularly prime feeding spots.

Feeding and Diet

The natural diet of Gastromyzon Cornusaccus consists mainly of benthic algae and associated micro-organisms scraped from solid surfaces. In a captive environment, they readily accept high-quality dried foods, meaty items like live or frozen bloodworms, and home-made foods containing a mix of natural ingredients. A mature aquarium with abundant algae-covered rocks and surfaces is crucial for their long-term well-being. If algae growth in the main tank is insufficient, a separate tank may be necessary to cultivate algae and periodically switch it with the main tank. Keeping algal types like diatoms and softer green varieties is preferred over tougher algae types. Proper feeding is vital, especially if acquiring emaciated specimens, to ensure their recovery and overall health.

Reproduction & Dimorphism

Gastromyzon Cornusaccus has not been successfully bred in captivity, and documented attempts have only been made on related species. Observations on breeding by a German aquarist provided insights into the spawning behavior of Gastromyzon loaches. Successful breeding attempts involved providing suitable tank conditions, including adequate cover, a rich diet, and stable water parameters. The fry hatched from the eggs displayed specific behavioral traits and dietary requirements for their initial growth. While sexual dimorphism specifics for Gastromyzon Cornusaccus are unreported, observations on other species suggest that adult females may appear heavier-bodied and slightly larger than males.

Habitat and Distribution

Gastromyzon Cornusaccus is native to the Sungai Kinarom river, which flows into Marudu Bay in Sabah, Malaysian Borneo. These loaches inhabit swift, shallow streams with clear, oxygen-rich water, found at elevations varying from sea level to 1350 meters above sea level in the hill regions of Borneo. Typically dwelling in riffles and runs, they prefer substrates of gravel, rocks, or boulders covered with algae and reside in partially or fully shaded areas with minimal aquatic plants. The Sungai Kinarom river also hosts a diverse collection of fish species, indicating a rich and dynamic ecosystem influenced by the loach’s preferred habitat conditions.

Aquarium Setup

To replicate the natural habitat of Gastromyzon Cornusaccus, it is imperative to maintain clean, well-oxygenated water in the aquarium. Setup recommendations include over-sized filtration systems with a turnover of 10-15 times per hour, supplemented with powerheads or airstones as necessary. The tank should feature a substrate of gravel or sand, adorned with water-worn rocks, pebbles, and aged driftwood. Utilizing adaptable aquatic plant species like Microsorum, Crinum, and Anubias can enhance the environment, providing cover and promoting algae growth. Regular maintenance, stable water conditions, and adequate biofilm for feeding are essential for the well-being of these loaches.